Seems most of the people in this thread were successful then (myself included). According to the Facebook page, NOMS 'had over 2,300 people apply and we have invited just over 500 to take the numerical test. We are looking for around 150 to take through to the JSAC'. That means there was a success rate of 21% for this stage. There will be a success rate of 30% for the next two stages (500>150 and 150>50 [interviews]) before dropping down to 24% for those ultimately selected for the final 12 spots.
It does not look as scary as it did to begin with (i.e. only 0.5% of those applying will eventually be selected). I imagine the difference between candidates will start to widen now.